Promoting effects of Ce and Pt addition on the destructive performances of V 2 O 5 /γ-Al 2 O 3 for catalytic combustion of benzene

Yang, Peng; Li, Jingrong; Cheng, Zhen; Zuo, Shufeng

doi:10.1016/j.apcata.2017.05.016

Cited by 36 publications

(15 citation statements)

References 41 publications

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“…However, the catalytic activity decreases when Ce loading is 15%, which is due to the fact that Ce acts as a promoting component and too much Ce loading may override the PdO active sites. Similar results have been reported in our previous research [ 40 , 41 , 42 ]. Thus, proper Ce content and the metal-metal interaction can significantly enhance the Pd/Ce/AlNi-PILC activity.…”

Section: Resultssupporting

confidence: 93%

Study of CeO2 Modified AlNi Mixed Pillared Clays Supported Palladium Catalysts for Benzene Adsorption/Desorption-Catalytic Combustion

Zuo

Yang

et al. 2017

Materials

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A new functional AlNi-pillared clays (AlNi-PILC) with a large surface area and pore volume was synthesized. The performance of adsorption/desorption-catalytic combustion over CeO2-modified Pd/AlNi-PILC catalysts was also studied. The results showed that the d001-value and specific surface area (SBET) of AlNi-PILC reached 2.11 nm and 374.8 m2/g, respectively. The large SBET and the d001-value improved the high capacity for benzene adsorption. Also, the strong interaction between PdCe mixed oxides and AlNi-PILC led to the high dispersion of PdO and CeO2 on the support, which was responsible for the high catalytic performance. Especially, 0.2% Pd/12.5% Ce/AlNi-PILC presented high performance for benzene combustion at 240 °C and high CO2 selectivity. Also, the combustion temperatures were lower compared to the desorption temperatures, which demonstrated that it could accomplish benzene combustion during the desorption process. Furthermore, its activity did not decrease after continuous reaction for 1000 h in dry air, and it also displayed good resistance to water and the chlorinated compound, making it a promising catalytic material for the elimination of volatile organic compounds.

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Section: Resultssupporting

confidence: 93%

Study of CeO2 Modified AlNi Mixed Pillared Clays Supported Palladium Catalysts for Benzene Adsorption/Desorption-Catalytic Combustion

Zuo

Yang

et al. 2017

Materials

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“…Some chlorine atoms remain coordinated to gold atoms at pH < 7, whereas Au(OH) 4 − becomes the dominant species at pH > 7 [7]. In general, chlorine adsorbed on noble metal is detrimental to catalytic activities [17,18]. Therefore, alkaline conditions are usually used to deposit gold on iron oxides to avoid the negative effect of chlorine.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Synthesis of Iron Oxide-Supported Gold Catalyst under Self-Generated Alkaline Conditions for Efficient Elimination of Carbon Monoxide

Pan

Zhang

et al. 2018

Catalysts

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Goethite- and hematite-supported highly dispersed gold catalysts for carbon monoxide oxidation were synthesized by gold precursor adsorption onto the support materials in self-generated alkaline solutions. The support materials were prepared by reacting iron nitrate with excess sodium hydroxide. The residual minor alkali incorporated into the support could provide suitable alkaline conditions at approximately pH 8 for the hydrolysis of tetrachloroaurate anions and the subsequent adsorption process. Gold species underwent autoreduction to achieve activation during the synthesis. An increase in pH or temperature to 80 °C decreased the gold loading of the catalysts. The optimal catalysts could achieve complete oxidation of carbon monoxide at −20 °C.

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“…5%REEs/MCM-22 (REEs = Y, Ce, La, Pr, and Nd) were prepared by the impregnation method in our previous research [9]. x%Y/MCM-22 (x = 2.5, 5, 7.5, 10, 12.5) were prepared with different contents of Y.…”

Section: Catalysts Preparationmentioning

confidence: 99%

“…The composition of the reaction mixture was SiO 2 /A1 2 O 3 = 30, Na/SiO 2 = 0.29, hexamethyleneimine (HMI)/SiO 2 = 0.6, HMI/Na = 2.08, and H 2 O/SiO 2 = 30. 5%REEs/MCM-22 (REEs = Y, Ce, La, Pr, and Nd) were prepared by the impregnation method in our previous research [9]. x%Y/MCM-22 (x = 2.5, 5, 7.5, 10, 12.5) were prepared with different contents of Y.…”

Section: Catalysts Preparationmentioning

confidence: 99%

“…To date, the catalysts employed for catalytic oxidation can be broadly classified into three categories: (i) noble metal-based catalysts (Pd, Pt, Ru, Au, Ag, etc. ), (ii) transition metal oxide-based catalysts, and (iii) rare earth metal oxide-based catalysts [6][7][8][9]. Supported noble metal catalysts are often used in toluene and various VOC catalytic oxidation processes due to their preferable catalytic activity and stability, despite their high cost [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Y-Modified MCM-22 Supported PdOx Nanocrystal Catalysts for Catalytic Oxidation of Toluene

et al. 2019

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A series of rare earth elements (REEs)-modified and Mobil Composition of Matter (MCM)-22-supported Pd nanocrystal catalysts were synthesized via a high-temperature solution-phase reduction method and tested for toluene complete oxidation. These catalytic materials were systematically characterized by N2 adsorption/desorption, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectroscopy (EDS), inductively coupled plasma atomic emission spectroscopy (ICP-AES), temperature-programmed surface reaction of toluene (toluene-TPSR) and X-ray photoelectron spectroscopic (XPS) techniques in order to investigate the structure–catalytic property relationship. Moreover, catalysts with an appropriate yttrium content greatly improved the catalytic activity of 0.2%Pd/MCM-22. PdOx (x = 0, 1) nanoparticles, ranging from 3.6 to 6.8 nm, which were well distributed on the surface of MCM-22. Efficient electron transfer from the Pd2+/Pd0 redox cycle facilitated the catalytic oxidation process, and the formation of Pd (or Y) –O–Si bonds improved the high dispersion of the PdOx and Y2O3 particles. Toluene–TPSR experiments suggested that the addition of Y2O3 improved the physical/chemical adsorption of 0.2%Pd/MCM-22, thus increasing the toluene adsorption capacity. Then, 0.2%Pd/7.5%Y/MCM-22 exhibited the highest catalytic performance. In addition, this catalyst maintained 95% conversion with high resistance to water and chlorine poisoning, even after toluene oxidation at 210 °C for 100 h, making it more valuable in practical applications.

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Promoting effects of Ce and Pt addition on the destructive performances of V 2 O 5 /γ-Al 2 O 3 for catalytic combustion of benzene

Cited by 36 publications

References 41 publications

Study of CeO2 Modified AlNi Mixed Pillared Clays Supported Palladium Catalysts for Benzene Adsorption/Desorption-Catalytic Combustion

Study of CeO2 Modified AlNi Mixed Pillared Clays Supported Palladium Catalysts for Benzene Adsorption/Desorption-Catalytic Combustion

Adsorption Synthesis of Iron Oxide-Supported Gold Catalyst under Self-Generated Alkaline Conditions for Efficient Elimination of Carbon Monoxide

Y-Modified MCM-22 Supported PdOx Nanocrystal Catalysts for Catalytic Oxidation of Toluene

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